Fuel Cell Performance Forum: SSI-List
Thread: Fuel Cell Performance
# 18698 byvictoriatangoman on Dec. 6, 2003, 4:10 p.m.
Member since 2022-08-22
--- In ssi_list@... "Paul D. Fernhout"
> >
> > Here is the website of the developer:
> > http://www.bobschmitthomes.com/index.htm
> >
> > RESIDENTIAL ENERGY USE DATA
> > MONTH -- kWh/ft^2 -- Typical 2,100 ft^2 Home -- % of annual usage
> >
> > January -- 1.77 -- 3,717 kWh -- 15.69%
> > February -- 1.33 -- 2,793 kWh -- 11.79%
> > March -- 1.03 -- 2,163 kWh -- 9.13%
> > April -- 0.65 -- 1,365 kWh -- 5.76%
> > May -- 0.58 -- 1,218 kWh -- 5.14%
> > June -- 0.67 -- 1,407 kWh -- 5.94%
> > July -- 0.77 -- 1,617 kWh -- 6.83%
> > August -- 0.56 -- 1,176 kWh -- 4.96%
> > September -- 0.55 -- 1,155 kWh -- 4.88%
> > October -- 0.67 -- 1,407 kWh -- 5.94%
> > November -- 1.20 -- 2,520 kWh -- 10.64%
> > December -- 1.50 -- 3,150 kWh -- 13.30%
> >
> > Total Annual Consumption -- 23,688 kWh
>
> Even if that is true for a "typical" home, you need to look at the
> energy efficient one, because cost says it is cheaper to conserve
> than produce power.
What do you mean "even" if it's true? This is *actual* data, not
projections from the Rocky Mountain Institute. Actual data is true
data.
> > For gaseous storage of the O2 and the H2, the tankage will mass
> > 563 kg.
>
> The system can release 02 to the air and take it back as needed.
When the fuel cell is activated it needs H2 and O2 to make
electricity.
The fuel cell will activiate when the solar cells are no longer
generating power.
How will the atmospheric oxygen plant extract oxygen from the air
when there is no electricity coming from the fuel cell to power it
because there is no oxygen to combine with the hydrogen to run the
fuel cell?
It takes power to extract oxygen and you don't have any. Chicken and
egg.
> > The homeowner will require 239 m^2 of solar PV arrays, a fuel
> > cell apable of 95 kWh/day output, and storage tanks with a
> > capacity for 5,040 kg of gaseous H2 and O2, with the tanks
> > massing 46,200 kg.
> Again, perhaps smart cars can deliver this hydrogen to a central
> station in summer and take it back in winter.
This is the same problem of supply and demand that grid connected
solar and wind farms encounter.
When the wind is gusting all the wind turbines supply power to the
grid. This HUGE influx of power immediately lowers the price. When
the wind stops gusting, all those connected turbines immediately
draw power from the grid to supplement the homeowners' systems. This
immediately raises the price of the power. It is at this point of
momentary power scarcity that additional sources of power are needed
to supply the demand. Rather, all that supply is usually dumped on
the market when the demand is suppressed because these wind turbines
are meeting their own need.
What is a central station to do with all of the excess hydrogen
produced in the summer? Where will all of the scarce hydrogen come
from when the demand skyrockets in the Winter?
TangoMan